Taxpayer Identification Number

A Tax Identification Number (TIN) is a unique set of numbers specifically assigned to an individual or organization to create a “fingerprint” that can facilitate their identification for the government and its agencies. In Singapore, individuals are assigned a Tax Reference Number issued by the Inland Revenue Authority of Singapore (IRAS) and businesses and other organizations are assigned with a Tax Identification Number known as the Unique Entity Number (UEN), assigned by the Accounting and Corporate Regulatory Authority of Singapore (ACRA) or other government agencies. In both cases, the number assigned is comprised of a 9 to 10-digit combination of numbers and letters.
For Singapore citizens and permanent residents, your tax identification number is your IC.
For non-Singapore citizens and permanent residents, you can find your tax identification number on your tax returns.